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【单选题】
液压传动是利用( )压力来传递动力和进行控制的一种传动方式。A.
气体
B.
固体
C.
液体
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【简答题】如何区分原生起源中心和次生起源中心。
【简答题】次生起源中心(名词解释)
【简答题】次生起源中心
【简答题】次生起源中心
【单选题】Product design and process selection are examples of _______ decisions.
A.
financial
B.
tactical
C.
system design
D.
system operation
E.
forecasting
【单选题】The process of improving reliability and lowering costs is central to the intensive and widespread use of design software because _________.
A.
it allows concurrent engineering to speed up process
B.
it allows databases to speed up every stage
C.
it allows engineers to speed up every stage of the design process
D.
it allows the design team to further improve process
【简答题】A patent protects such IP rights as the design or process of a product by giving the patent owner______.
【简答题】The process in the design process model involves , , , , , 。
【简答题】次生起源中心（secondary origin center）
【单选题】The development process in the software （74） involves four phases: analysis，design, implementation, and testing.
A.
maintenance
B.
lifecycle
C.
programming
D.
upgrading
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